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Examensarbeiten in der Abteilung Halbleitermaterialien

Characterization of Bi2Se3 topological insulator films

(experimental)

Topological insulators are a new class of exciting materials with fascinating physics and a large application potential. A series of Bi2Se3 thin films have been prepared by molecular beam epitaxy. Your task will be to characterize their electrical and optical properties. This includes temperature dependent Hall measurements to determine carrier concentration and mobility, as well as optical absorption measurements by Fourier transform infrared (FTIR) spectroscopy. In addition, we would like to modify the films by ion beam doping, which will allow us to shift the Fermi energy and thus modify the properties. This work will be done together with our young-investigator group leader Dr. Shengqiang Zhou.